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arXiv 1707.04836astro-ph.HE
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UHECR源演化与高能中微子和γ射线

The UHECR source evolution and high-energy neutrinos and γ-rays

Roberto Aloisio, Denise Boncioli, Armando di Matteo, Sergio Petrera, Francesco Salamida

摘要:

超高能宇宙射线与背景光子的相互作用限制了宇宙射线到达我们的距离,使其通量的测量对高红移源的特性不敏感。另一方面,二次PeV-EeV中微子产生的UHECR传播可以到达地球,即使从非常高的红移,和电磁级联发起的二次光子和电子/正电子有助于扩散的伽马射线背景。因此,结合UHECR,中微子和伽马射线数据的多信使分析仍然可以提供有关UHECR源的宇宙学演化的信息。在这项工作中,我们比较预测的粒子通量从蒙特卡罗模拟在各种情况下与最近的实验数据,并讨论了结论,可以得出有关UHECR源和它们的宇宙学演化。

英文摘要:

Interactions of ultra-high-energy cosmic rays with background photons set a limit to the distance cosmic rays reaching us above a certain energy can originate from, making measurements of their fluxes insensitive to properties of sources at high redshifts. On the other hand, the secondary PeV--EeV neutrinos produced in UHECR propagation can reach the Earth even from very high redshifts, and electromagnetic cascades initiated by secondary photons and electrons/positrons contribute to the diffuse gamma-ray background. Therefore, a multi-messenger analysis combining UHECR, neutrino, and gamma-ray data can still provide information about the cosmological evolution of UHECR sources. In this work, we compare predicted particle fluxes from Monte Carlo simulations in various scenarios with recent experimental data, and discuss the conclusions that can be drawn about UHECR sources and their cosmological evolution.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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